Violin in



H. F. FISHER.

VIOLIN INSPECTING DEVICE.

APPLICATION FILED JAN-23.1918.

1 ,306,953. Patentd June 17, 1919.

INVENTOR mm: 1'. or 1mm rains! conmu, cnuna.

' V VIOIJI-DISPECTIlQ'G- Device.

We... of Letters Patent.

' Appli'cnfion filed January 23, 1918. Serial No. 213,363.

To all 20. mm it may concern Be it known that I, HENRY F. FISHER, a citizen of the United States, residing at 7 Vancouver, in the Province of British Go lumbia, Canada, have invented certain. new and useful Improvementsin Violin-Inspecting 'Devices, of which the following is a specificatio V This invention relates to a device enabling the interior 'walls of a violin or the like instrument to be inspected.

The limited size of the sound holes of such musical instruments and the existence of such obstructions as bridges and the like within the sound box, prevent anything but an extremely limited examination of the finish and'condition of the interior walls tobe made, yet the condition of these walls 1 is very material in estimating the quality and value of the instrument.

The device, which is the subject of this application, is designed to illuminate the interior of the sound box of an instrument of this class and permit examination to be made of the interiorwalls by a. reflecting mirror carried adjacent the light. p The invention is particularly described g made to the drawing by which it is accompanied, in which:

Figure 1 is a general view of the device 7 showing its apphcation to the examination of the interior wall of a violin through the f hole.

Fig. 2 is a side elevation, artly in section of the mirror and light ho end of my improved device.

Fig. 3 is a face view of the end mirror.

Fig. 4 is a cross section on the line H on Fig. 2; V

The device comprises the combination with a. battery cell, preferably 'inclosed within a suitable casing -3, which is provided with acut-out switch, of a tubular conduit 4 removably connected at 5 to the casing 3, that the wires from the cell may be conducted along the conduit to the socket of a small incandescent lamp bulb 2- This bulb may require to be of special form where it is to be passed through the 7'.

hole of a violin, as the size of such apertures is limited in width.. The bulb may be ex:

at the;

" k of the filament ormay axially in thefollowing specification, reference betremelyuiliattened with a. reflectinge surface elongated, as shown in Fig. 1, so asto get the required length of filament within a 7 socket and parallel to it is a stem 7 which is similarly curved to the conduit.

The end of this stem 7 is bent as at 8 towardthe concave side of the are of curvature to an angle that when the duct and stem are inserted within the-instrument a. small mirror IO-socketed on the tapered end of the stem will reflect that rtion of the wall of the instrument toward which it is directed, and will at the same time afford a view of the reflection from the sound aperture. The curvature of the socket and stem prevent the rotation of one in relation to the other.

The device as dmcrib'ed may be inserted in the sound aperture of an instrument and being directed toward that part of the wall, inspection of, which is required, that portion of the wall, illuminated by the lamp 2, will be reflected in the mirror 10 and viewed either from the aperture through which the device is inserted or through an adjoining aperture, if such there be, that will afford a view of the mirror.

Defects in the finish of the inner surface of the instrument, or patches and repairs to the same that may affect its value, may thus be inspected and the value of an instrument more accurately determined than under the general inspection at present obtainable.

It must'be distinctly understood that the invention is not limited to the particular construction herein set forth as the same may be varied to suit the requirements of any particular instrument or the convenence of manufacture.

rected to reflect any desired portion of the interior wall and afford .a view of the reflection iron"; the sound aperture.

Havingnow articularly described my invention, here y declare that what I claim Patented June 17, 1919. i

as new and desire to be protected in by Letmember having also a correspondingly ters Patent, is: curved tubular socket at the end adjacent Means for viewing the interior of a shalthe lamp, a stem curved to correspond with low inclosed space through a small aperthe tube and e'ndwise slidable in the socket, 5 him in one of the larger sides, said means the outer end of said stem being turned to 15 comprising a curved tubular member having the inner side of the curve at a slight angle an incandescent lamp removably connected and tapered, a small mirror having a socket to one end, wires leading through said tubuto receive the tapered end of said stem. lar member to said lamp, and a source of Intestimony WhereofI aifix my signature. .10 energy connected to said wires, said tubular I HENRY F. FISHER. 

